Ad una mia ulteriore sollecitazione al riguardo Minisini specifica che:
« You have to use a DrawingArea control. Moreover, beware that controls are windows, and that windows are not transparent (they keep being a rectangle with a background color).
Unless you use Gambas 3 and gb.qt4, where controls are not windows anymore, and so can show what is behind the part of their window that is not drawn. See the QT4 QWidget documentation for more information about that. Moreover, with Gambas 3, you will be able to use the Paint class to do antialiased drawing, so that your round things are beautiful. »